We’re soon looking to get the Leaderboards on the website, which should answer that question once and for all 🙂
Based on how Leaderboards generally work though I suspect you’re seeing platform boards. Easiest way to check is to have people on different platforms see who is #1 and if it’s the same time.

When we have finalised Oculus DLC plans, we'll make a big announcement like we do anything else that's new.
I appreciate that it's frustrating not to know everything, but once things are locked in we'll look to announce as quickly as possible 🙂